The Adafruit Feather 32u4 LoRa Radio (RFM9x) is a portable microcontroller with an integrated Long Range (LoRa) packet radio transceiver, designed for wireless networks that offer longer range than 2.4GHz radios like Bluetooth or Wi-Fi, with lower power consumption. It features the powerful ATmega32u4 chip and an RFM9x 433 MHz radio module, making it perfect for remote communication and IoT projects.
Key Features:
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Feather 32u4 Platform: Thin, lightweight, and portable microcontroller with ATmega32u4 (8MHz, 3.3V logic), 32KB flash, 2KB RAM, and built-in USB support.
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LoRa Radio Module: Integrated RFM9x LoRa 433 MHz radio module for long-range communication (up to 1.2 miles/2km line-of-sight).
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Battery Charging: Built-in LiPoly battery charging with support for 3.7V lithium polymer batteries, plus an automatic switch to USB power when plugged in.
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Battery Monitoring: Analog pin for battery voltage monitoring, ensuring you can check the battery level for recharging.
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USB Native Support: Comes with a USB bootloader for easy programming and serial debugging via the Arduino IDE.
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Multiple GPIO and Communication Interfaces: 20 GPIO pins, hardware serial, I2C, SPI, 7 PWM pins, and 10 analog inputs for flexible project expansion.
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Low Power Consumption: ~300uA during full sleep, ~120mA peak during transmit, and ~40mA during active radio listening.
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LoRa Performance: Can transmit up to 1.2 miles/2km with a simple wire antenna. With directional antennas and settings tweaks, up to 20km range is possible.
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Customizable Power Output: +5 to +20 dBm up to 100mW power output capability (selectable via software).
Additional Specifications:
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Dimensions: 2.0" x 0.9" x 0.28" (51mm x 23mm x 8mm), weight: 5.5g.
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Built-in 100mA Lipoly Charger: Includes a charging status indicator LED.
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Mounting Holes: 4 mounting holes for easy enclosure attachment.
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Simple Antenna Setup: Includes a spot for a uFL connector or a simple wire antenna.
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Reset Button: Easy reset for project troubleshooting.
This board is fully assembled and tested, with headers included for soldering, and is ready to be used with the Arduino IDE. The LiPoly battery and USB cable are not included but are available in the store. Perfect for projects that require a balance between long-range communication and low power usage.